Emergency Contraception  
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This Care Guide Covers:

  • Emergency birth control after unprotected sex (morning after pill)
  • Female
  • Not pregnant

If not, see these topics
When to Call Your Doctor

Call Your Doctor Now (night or day) If
  • You were forced to have sex (assault or rape)
Call Your Doctor Within 24 Hours (between 9 am and 4 pm) If
  • You think you need to be seen
  • Unprotected sex within past 72 hours (3 days)
  • Unprotected sex within past 72-120 hours (3-5 days; ECP is less effective)
Call Your Doctor During Weekday Office Hours If
  • You have other questions or concerns
Self Care at Home If
  • Unprotected sex that happened more than 120 hours (5 days) ago
  • Questions about ECPs
Causes & Health Information

Some Basics...

When Should a Woman Consider Using Emergency Birth Control?

What are Emergency Contraceptive Pills (ECPs)?

ECPs are hormone pills that prevent pregnancy after sex. They are also called "morning after pills," "morning after contraception," or "day after pills."

Where Can a Person Get ECPs?

Is a Prescription Needed for ECPs?

What are Intrauterine Devices (IUDs)?

CARE ADVICE FOR EMERGENCY CONTRACEPTION

Emergency Contraceptive Pills (ECPs)
  1. What You Should Know:
    • Emergency contraception (birth control) works well to prevent pregnancy after sex. It works best if taken right away after sex, but can be taken up to 5 days after sex.
    • ECPs are just for emergency situations.
    • ECPs do not work as well as regular birth control methods in preventing pregnancy.
    • ECPs do not prevent STDs.
    • Here is some care advice that should help.
  2. How Effective are ECPs? Of women who have unprotected sex in week 2 or 3 of their menstrual cycle:
    • 8 out of 100 women will get pregnant without using an ECP
    • 3-4 out of 100 women will get pregnant if they use an ECP 3-5 days after sex
    • 1-2 out of 100 women will get pregnant if they use an ECP less than 3 days after sex
  3. Side Effects of ECPs
    • Nausea: 30-60% of women
    • Vomiting: 5-20% of women
    • Stomach pain: 10-20% of women
    • Fatigue and headache: 10-20% of women
    • Change in periods: 50% of women
  4. Do I Need a Prescription for ECPs?
    • Australia: ECPs are sold over-the-counter (OTC). Examples are Levonelle-1, NorLevo, and Postinor.
    • Canada: ECPs are sold OTC. Examples are NorLevo and Plan B.
    • United States: ECPs are sold OTC. Women who are 17 and over can buy Plan B. Men and women who are 18 and over can also buy other ECPs. Examples are Next Choice, Plan B, and Plan B One-Step.
  5. Emergency Contraception Hotline - United States:
    • Run by the Association or Reproductive Health Professionals
    • Hotline has information and phone numbers of ECP providers.
    • Toll-free phone number: 800-584-9911
    • Their website is also helpful: http://ec.princeton.edu/providers/index.html
  6. Internet Resources:
  7. Call Your Doctor If:
    • You have other questions or concerns
Home Urine Pregnancy Tests
  1. What You Should Know:
    • Home pregnancy tests do not cost much and are easy to use. Most drugstores sell these tests over-the-counter (OTC).
    • Urine pregnancy tests are very accurate. They can often tell if you are pregnant during the first week after your missed period. This will be 2 weeks after you ovulate.
    • The test works best with urine from when you first wake up in the morning.
    • If you believe you are pregnant and the home test is negative, repeat it in 3-5 days. You should also talk to your doctor about other testing.
    • The pregnancy test may not work right if there is blood in your urine. A small amount of blood should not cause a problem.
    • You can find more information at: http://www.womenshealth.gov/
  2. Pregnancy Test, When in Doubt:
    • If there is a chance that you might be pregnant, use a urine pregnancy test.
    • You can buy a pregnancy test at the drugstore.
    • It works best first thing in the morning.
    • Follow all package instructions.
  3. Call Your Doctor If:
    • Pregnancy test is positive or you have trouble with the at-home test
    • You get worse

Remember! Call your doctor if any of the "When to Call" symptoms occur.

Disclaimer: This information is not intended be a substitute for professional medical advice. It is provided for educational purposes only. You assume full responsibility for how you choose to use this information.


Author and Senior Reviewer: David A. Thompson, M.D.

Last Reviewed: 9/1/2012

Last Revised: 11/14/2012

Content Set: Adult Symptom Checker

Copyright 2000-2012. Self Care Decisions LLC; LMS, Inc.